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Digitally-enhanced analogue power controllers improve support for battery charging and DC-DC converters

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By Nick Flaherty


Based around a PIC 8bit microcontorller, the MCP19124/5 handles configurable charging algorithms for any chemistry, with capabilities for cell balancing and super-capacitor charging. No other single-chip battery-charging solution can be configured with any desired charging profile, for any battery chemistry, voltage, or cell arrangement.

Engineers can develop their own unique charging methods using any voltage, current, temperature, or duration to trigger a transition to a new portion of the charge profile. The devices combine synchronous low-side MOSFET drivers, high voltage linear regulator, temperature sensing diode and 10 bit A/D converter for any DC-DC application requiring tight voltage or current regulation; capable of supporting flyback, boost, SEPIC, or Cuk topologies.

The MCP19124/5 combines independent voltage and current control loops. Either the current control loop can regulate to a specified target current, or the voltage control loop can regulate to a target voltage. Each analogue control loop has a separate feedback network for independent pole-zero placement, and the ability to perform zero-cross detection for quasi-resonant operation. The ability to dynamically switch from a voltage target to a current target, or vice-versa, by switching between the two control loops without glitching or transient events allows for pre-positioning of the output voltage at open or no-load conditions, greatly minimising transients when a load is applied.

 A full suite of configurable, adjustable performance parameters can be set in the internal registers of the device with no external components required and the settings are dynamically adjustable during operation. 

Devices are available in volume production in 4×4 and 5×5 QFN packages.

For more information, visit Microchip’s Web site at:  https://www.microchip.com/wwwproducts/en/MCP19125


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